N14 Celect check valve

Wondering if my Celect engine has a check valve where the fuel filter line attaches to the ECM? Mine has a straight fitting, whereas the Celect + engines have a 90* fitting. Is there a check valve in the straight fitting?there is a 90* fitting on back of the pump.

 

So, does having the straight fitting denote, “no fitting”? Is that a check valve(90* fitting) on back of my pump?

 

I haven’t ran this truck in over a month and I started it the other day and it fired up immediately but then died. Took longer than usual to get it started again but after it ran awhile, then it’d start up as soon as I bumped the key. It will do this every time if the truck sits for a day. I changed the fuel filter and it was very dirty. If there’s a check valve in that fitting I’ll pull it but was just wondering cause this fitting is fairly short.

 

Should I just disassemble, check if debris is in there and if so, replace it or just clean it. Can it being dirty weaken the spring?

 

I’m gonna remove the fuel line and if there’s a check valve in the fitting it should restrict a very small screw driver from going through. Correct?